# Recommendation R.90 (11/1988): Organization for locating and clearing faults in international telegraph switched networks

> recommendation/international standard from the International Telecommunication Union

**Wikidata**: [Q27051431](https://www.wikidata.org/wiki/Q27051431)  
**Source**: https://4ort.xyz/entity/recommendation-r-90-11-1988-organization-for-locating-and-clearing-faults-in-international-telegraph-switched-networks